Rubber thread composition, rubber thread and thread-wound golf ball
OwnerKazuhiko Isogawainventor
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Abstract
A rubber thread composition contains a natural rubber and a synthetic isoprene rubber. The synthetic isoprene rubber has a cis-1,4 bond content of at least 90%, a molecular weight distribution of the synthetic isoprene rubber has only a single peak, and a ratio Mw/Mn between a weight-average molecular weight Mw of the synthetic isoprene rubber and a number-average molecular weight Mn thereof is 2.5-3.7. A rubber thread is produced by shaping the rubber thread composition into a sheet, vulcanizing the sheet and cutting the sheet into threads. A thread-wound golf ball includes a center, a thread-wound core formed by winding the rubber thread around the center, and a cover wrapping the thread-wound core.
Claims4
A rubber thread composition containing a natural rubber and a synthetic isoprene rubber, said synthetic isoprene rubber having a cis-1,4 bond content of at least 90%, a molecular weight distribution of said synthetic isoprene rubber having only a single peak, and a ratio Mw/Mn between a weight-average molecular weight Mw of said synthetic isoprene rubber and a number-average molecular weight Mn thereof being 2.5-3.7.
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